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SystemBC_malware

YARA-2023-0002 Medium general Active

Detect_SystemBC

SystemBC_malware.yar Valid Syntax 
rule SystemBC_malware: SystemBC 
{
    meta:
	description = "Detect_SystemBC"
	author = "@malgamy12"
	date = "2023/1/9"
        license = "DRL 1.1"
        hash = "b369ed704c293b76452ee1bdd99a69bbb76b393a4a9d404e0b5df59a00cff074"
        hash = "0da6157c9b27d5a07ce34f32f899074dd5b06891d5323fbe28d5d34733bbdaf8"
        hash = "70874b6adc30641b33ed83f6321b84d0aef1cf11de2cb78f78c9d3a45c5221c0"
        hash = "bf1f17dce8eccc400641a0824da39cea19c2dd0c9833855542abb189bd0e5f7e"
        hash = "3c10661e4d448ee95acf71b03a31e12181956a72cd2d75934b583c4e19321be8"
        hash = "fe2512e3e965a50f35a332cfc310069697ad797e782c32ba30596b4c88f9e090"
        hash = "2072b666365701aed7143e9d241ab975e21af78fce6bbf14fd0bdd6c137a18ce"
        hash = "0e5a3f858456145f09d44201ceed7bef5a96451875f2327ac7c3e8cbdeb7a856"
        hash = "252270954f4544d236b6ff7cb9b9151262f8369c1f9a256c647bcb02277ab7ef"
        hash = "2a4bd69263a466d5c81cc76efba740cbb90440628eb58c10203d7a9aa8fbee59"
        hash = "0bacbe9942287d0273c7b2cf7125cb01c85964ad67012205a0f8eb31b382c511"
        hash = "018de46acf37d72323c17393a105e3aeae8751e53dba2bd056d4d432a6de98e2"
        hash = "a6ab4d3120570214d762ccc1222a4a1559ef6e46cee214ec375974025dcec997"
        hash = "c23d52a06ec6552de165f9261628dff15fd03b07c8dd2247aa2968a05ee1a90e"
        hash = "47cbe4c03441a7796c8d3a2bdaeb998969d5137dd0469db891318606cff1f432"
        hash = "4c9a783544c7f44fb3f058837f0d5723fdaabbeb22b58ce635667b3ba2c6e7d3"
        hash = "21adaf466ea988688d3e107a0f95237817189bce0b4f05d232f9d30b97bf68d4"
    strings:
	$s1 = "GET /tor/rendezvous2/%s HTTP" ascii
        $s2 = "https://api.ipify.org/"
        $s3 = "https://ip4.seeip.org/"
        $s4 = "directory-footer"
        $s5 = "KEY-----"
        $op1 = {8A 94 2B [4] 02 C2 8A 8C 28 [4] 88 8C 2B [4] 88 94 28 [4] 02 CA 8A 8C 29 [4] 30 0E 48 FF C6 48 FF CF}
    condition:
        uint16(0) == 0x5A4D and all of them
}

Rule Metadata

description
Detect_SystemBC
author
@malgamy12
date
2023/1/9
license
DRL 1.1
hash
21adaf466ea988688d3e107a0f95237817189bce0b4f05d232f9d30b97bf68d4

Tags

SystemBC

String Definitions

{"name":"$s1","value":"\"GET \/tor\/rendezvous2\/%s HTTP\" ascii"}
{"name":"$s2","value":"\"https:\/\/api.ipify.org\/\""}
{"name":"$s3","value":"\"https:\/\/ip4.seeip.org\/\""}
{"name":"$s4","value":"\"directory-footer\""}
{"name":"$s5","value":"\"KEY-----\""}
{"name":"$op1","value":"{8A 94 2B [4] 02 C2 8A 8C 28 [4] 88 8C 2B [4] 88 94 28 [4] 02 CA 8A 8C 29 [4] 30 0E 48 FF C6 48 FF CF}"}

Threat Analysis

This YARA rule is designed to detect general threats.

Severity Level: Medium

The rule uses pattern matching to identify specific byte sequences, strings, or behavioral patterns associated with malicious activity.

Detection Capabilities

  • File-based detection for executables and documents
  • Memory scanning for running processes
  • Network traffic analysis support

Command Line Usage

# Scan a single file
yara SystemBC_malware.yar /path/to/suspicious/file

# Scan a directory recursively
yara -r SystemBC_malware.yar /path/to/directory/

# Scan with metadata output
yara -m SystemBC_malware.yar target_file

# Scan process memory (Linux)
yara SystemBC_malware.yar /proc/[pid]/exe

Integration Examples

Python (yara-python)

import yara
rules = yara.compile(filepath='SystemBC_malware.yar')
matches = rules.match('/path/to/file')

ClamAV Integration

clamscan --yara-rules=SystemBC_malware.yar /path/to/scan

Rule Information

YARA ID
YARA-2023-0002
Created
August 19, 2025
Last Updated
August 19, 2025
Last Imported
Never

Threat Intelligence

Risk Level Medium
Category general
Detection Confidence Analysis Pending
False Positive Rate Not Available
Last Seen in Wild No Data

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Export Options

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